Operating phonograph over communication circuits



y 1946- H. R. VAN DEVENTER 2,399,961

OPERATING PHONOGRAPH QVER COMMUNICATION CIRCUITS v Filed Jan. 15, 1944 3Sheets-Shet l Fig-.2-

y H. R. VAN DEVENTER 2,399,961

OPERATING PHONOGRAPH OVER COMMUNICATION CIRCUITS Filed Jan. 15 1944 3Sheets-Sheet 2 iqzE- y 7, 1946- H. R. VAN DEVENTER 2,399,961

OPERATING PHONOGRAPH OVER COMMUNICATION CIRCUITS Filed Jan. 15, 1944 I 3Sheets-Sheet 3 I i l 89 I6 as 5 66 7%; 93 90 -||0 J09 FEE Q :09 H I2Invenfor Harry R WznDevenfer- L2 Jfforngr S Patented May 7, 1946OPERATING PHONOGRAPH OVER COM'MUNICATION CIRCUITS Harry R. Van Deventer,New York,-,.N. Y. Application January 15, 1944, Serial No. 518,346

48 Claims.

This invention relates to operating phonographs over communicationcircuits, and has for an object the provision of means operable oversuch circuits for connecting a phonograph thereto and either supplyingvia the circuit the necessary current for directly operating thephonograph motor, or (if a spring-wound motor or the like is used)supplying current via said circuit to wind the spring motor.

Another object is to provide circuits and instrumentalities incombination that will enable phonographs to be connected to linesterminating in the usual exchange equipment wherein the motors for thephonographs can be operated by current from a source located at theexchange and supplied. the phonograph motor via the cord circuits in theexchange when same are connected to the line circuit.

Figure 3 is a diagram of an alternate arrangement embodying theinvention;

Figure 4 is a diagram of an alternate arrangement embodying theinvention;

Figure 5 is a diagram'of the circuit connections of a cord circuit thatmay be used to connect telephone lines-shown in other figures;

Figure 6 is a diagram of the circuit connections f using a mechanicalmotor to operate the phono- 1 graphs when applied to a telephone system;

Figure 7 is a diagram of the circuit connections of a cord circuit thatcan be used to operate the A further object is to provide circuits andable a telephone and phonograph to be operated conjointly on the sameline circuit when connected to the exchange equipment now in common use,and where the motor for operatingthe phonograph is energized by currentsupplied via the telephone line.

instrumentalities in combination, that will en- Other objects will beapparent from the following specification wherein by way of illustrationpreferred embodiments of the invention are disclosed. It will beapparent however that once the inventive concept herein disclosed isunderstood,- many modifications will be apparent; their as limitativebut as defined in the appended claims.

It will be understood that by the term communication circuit" is meant aciruilt, Inch as a telephone circuit or any other circuit'over whichspeech or signals are transmitted, and over which such signals andoperating current for the phonographs may be separately orsimultaneously transmitted. Such lines have certain normal characteristics which might be interfered with by the disturbances created bythe"phonograph motors connected thereto. Therefore, means are hereindisclosed for filtering out such disturbances by means of filtersconnected to the motors and the circuits whereby the normalcharacteristics of the circuits are preserved.

illustrations therefore are not to be considered winding motors shown inFigures 6 and 8;

Figure 8 is a diagram of the circuit connections using a mechanicalmotor to operate the ph0n0 graphs when applied to a telephone system,and, Figure 9 is a diagram of the circuit connections of a telephoneinstrument and phonograph combination embodying the invention.

Inthe prior U. 8. Patent Number. 2,332,359, dated October 19, 1943, andU. S. application Serial Number 509,544, and flied on November 9, 1943,are shown phonographs that may be connected to telephone lines totransmit and record speech thereover. As shown in this patent andapplication, the phonographs are operated by motors connected to a localsource of current, such as the electric lighting circuit on thesubscriber's premises where the phonograph is located usually adjacentthe subscriber's telephone. Withsuch an arrangement the operation of thedevice is dependent upon the current supply which is often not under thecontrol of the teleequipment. a

I In many cases where it is desired to use phonographs on telephonelines, no electric current is available. This is especially true inisolated rural communities. With the system herein disclosed thephonographsare operated by current that may be supplied over thetelephone lines, thus placing all of the apparatus and the current sup-7 ply therefor under the control of the telephone company.

It will be understood that the telephone line wires Li, L2 inthe fi uresmay connect to the In the accompanying figures:

Figure l is a diagram 01' the circuit connections and arrangement ofdevices therein when the ment embodying the invention;

usual central oflice e ipment in common use. Such equipment in the caseof a so-called common battery system includes the usual line and cut-oflrelay, line lamp, Jacks, .etc., all of which may be of any desired andknown type. Such oilices have switchboard cord circuits for connectingthe various lines, and these may be of any known type, it being one ofthe objects of this invention to provide circuits and instrumentalitiesfor use at the telephones and phonogra hs which will require veryslight, if any, changes in the central ofllce equipment. Line and cordcircuits are shown in Patent Number 2,332,359 heretofore mentioned.

In Figure 1 the numeral Ill denotes within the dotted lines aconventional telephone instrument having a signal device such as ringerS, a condenser C, receiver R, transmitter T, hook switch H, andinduction coil I. The hook switch H is moved from normal open circuitposition to closed circuit position by an arm ll shown diagrammaticallyin the figure as operated by a cam l2,

driven by the phonogra h motor is, which also operates the record tablel4, carrying record i5, which when contacting reproducer It, producessound which issuing from II, impinges upon the adjacent transmitter T,and is transmitted over line Ll, L2, in the usual manner. Thus thephonograph is 'operatively connected to the circuit Ll, L2.

The phonograph motorgenerally denoted by the numeral l3 isof any desiredtype, and as shown diagrammatically drives the record table l4 at anydesired speed. The shaft of this motor makes a predetermined number ofrevolutions during which cam l2 operates arm II, the cam being geared orotherwise suitably driven. -As the details of construction of suchdevices are well known, they are not herein shown in detail, and in theFigures 2, 3 and 4. the motor, turntable,

' record, reproducer and other parts, as shown in Figure 1, arediagrammatically shown at. I3 as a motor winding only, for the sakeofsimplicity.

The foregoing briefly describes an acoustically coupledtelephone-phonograph combination as more fully described in copendingapplication before mentioned, and such a combination can be used withany of the circuits herein described. Should it be desired to use anelectric phonograph, then the circuits of same are shown in PatentNumber 2,332,359 hereinbeiore mentioned, and such electric phonographsmay be used with any of the circuits shown herein. 7

Adverting to Figure 1, the numeral l1 denotes the means for connectingthe phonograph and its motor to the line circuit Ll, L2. This may be a.suitable relay responsive, to ordinary ringing current, or it maycomprise contacts on the ringer S of the telephone instrument as shownin the Patent Number 2,332,359 aforesaid, or mechanism moved by theringer armature as shown in the application aforesaid. It is sumcient tostate here that the means I! is responsive to alternating current, thecondenser 18 in series therewith making it opaque to direct current.

An operator impressing ringing current on line Ll, L2 willoperatethemeans II, which closes contacts i9, as long as energized. Thisestablishes a path for current from line Ll via conductor 20, throughthe winding of motor I3, via conductor 2|, through contacts is, throughmanual switch 22 to L2. This will cause a slight operation of the motorl2.

- The operator rings several times on the line, or

if the machine ringing is used, the means ll will be operated a numberof tlmes say four, for a period of say one and one-half seconds on andone and one-half seconds "off" each time.

Each time the device ll operate it closes a circuit through motor l3,and each operation of the motor I2 moves cam l2 driven thereby until armll, resting on this cam, is raised sufliciently to close contact 28 tocomplete a circuit around contacts l9, so that the motor l3 will'nowoperate continuously throughout its cycleoperating on the currentflowing over line Ll, L2 from the central ofllce battery until cam I2drops arm II to open contact 23, whereupon the motor stops. As soon-ascontact 23 is closed thereby connecting motor l2 across the line Ll, L2,the supervisory signal in the operator's cord is extinguished in theusual manner; this is also brought about by the operation of arm llconnecting the telephone to the line, which telephone is alsodisconnected when arm I I is in the non-operating or "at rest" positionshown in the figure.

From the foregoing it will be seen' that the operations performed by theoperator, when calling on a telephone line equipped with a phonograph,do not differ in any way than when calling on a line not so equipped,and that the phonograph instrument at the subscribers station isentirely the contact 23 has closed, the operator cannot sto thephonograph, which must then complete its cycle, the record i5 beingrevolved suillciently to deliver the desired message while cam I2 makesone revolution.

Should it be desired to have the operator stop as well as start thephonograph-often desirable when recording-the arrangement shown inFigure 2 may be used, and the control means 24 is any suitable form ofstep-by-step or off and "on" relay which, on receiving an impulse ofcurrent, will close contacts 25, and on th next impulse, will open them.Here assuming the switch 22 to be closed, upon the operator ringing online L, L, the device 24 will close its contacts 25, therebyestablishing a circuit from Ll via. conductor 20 through winding 13 ofthe phonograph motor. through contacts" 25 and contacts 25 via conductor21 and switch 22 to L2. This starts the phonograph which continues torun until the operator again rings on the line L, L, and operates thedevice 24 to move its contacts 25 to open or off position.

Should the record l5 become exhausted so that the recorder or reproducerarm 28 must be reset, the contacts 25 are broken when the arm reachesthe end of the record and the phonograph is thereby stopped and willremain inoperative until arm 28 is reset. As soon as it is moved, if thedevice 24 is in the on position, the motor l3 will begin'to operate, butthe subscriber can prevent this by manually resetting the device 24 bypressing the usual reset button 29. As the construction of suchstep-by-step relays are well known, the device 24 is not here describedin detail.

The operation of the telephone instrument in connection with Figure 2 isthe same as'with Fi ure 1, except the arm Ila in'steadof being operatedlike the arm ll, Figure 1, by a cam on the phonograph motor, may beoperated by a magnet 30 which is always energized when the phonegraph isin operation. Thus with the arrangement shown in Figure 2, the operatorcan start and stop the phonograph, the motor of which is operated bycurrent flowing over the line Ll, L2.

The circuit, Figure 2, obviously cannot be used with machine ringing,for successive applications of ringingcurrent would cause the device 24to alternately open and close its contacts, but may in use.

- ringing. Here'the relay 3| has a winding ila in series with condenseril across the line Li, L2, and a locking winding, iib also across'theline in series with the motor ll, the normally Open contacts 32 and thelower contact 33 of the cam arm I I. When the operator rings on the line(switch 22 being closed), relay Ii closes contacts 32 and the linecurrent flows through the motor i3, winding lib and the lower contactII. holding the relay contacts 32 closed. This starts the motor,revolving cam i2 and raising arm II from contact 33 which opens thecircuit through winding lib of relay 3| which releases its contacts 32-.As 33 breaks contact with arm' ii, the latter closes contact 34 whichmaintains the circuit from Ll to L2 through the motor windings it, andthe motor continues to operate until cam i2 moves arm ii to open contact34 The operation of the telephone hook switch H,

is as previously described in connection with Fi ure 1.

In Figure 4 is shown a circuit embodying a time-delay relay of anysuitable type which closes immediately upon application of currentthereto, but remains closed whether further energized or not for somepredetermined time-say thirty seconds during which time the phonographmay either deliver or record a message.

In this figure the relay 35 has an armature or moving member 36 attachedto a dash-pot or other 'known' timedelay device ll. As many such relaysare known; the showing here is diagrammatic. This relay will, whenenergizedby the operator ringing on the line, close contact 38 therebyestablishing a circuit through the motor winding l3 and supplying samewith current from lines Li, L2. I

The telephone hook switch II is operated as previously described inconnection with Flgure 1.

The circuits previously described show apparatus for use on ordinarycommon battery telephone lines where the usual common battery voltagesand amperage is available at the telephone for operating the phonographmotors it, which only operate when the phonographs are actually As thephonograph-motors are connected to the talking circuits while the latterare in use, some motor noise may occur unless noise suppressors commonlytermed fllters" are applied. These may be placediin any of the circuitsherein described and are shown in Figured where 39, 40 denote suitablechoke coils in the motor circuit which may in addition have thecondenser 4| therein as shown. Any other suitable filtering ornoise-suppressing means may be employed to prevent the operation of themotor from ailecting the talking circuits.

In some installations it may be desirable to employ a higher voltage tothe telephone lines than that usually available in telephone exchangesin order to supply suitable current to the phonograph motors, and thismay be accomplished'with a minimum change in the central ofllceequipment by the arrangement shown in Figure 5. Here a switch key 42 isconnected as shown so that normally the regular exchange battery 43 isconnected to plug 44. when key is operated, it substitutes the highervoltage battery with its attendant-relays etc., for the regular battery43. The relays or repeating coils associated with battery 45 aresuitable Ior use with the voltage of said battery. The supervisory lamp46 is not switched by'key 42, but when the latter is operated, aresistance 41 is placed in series with the lamp to compensate for theincreased voltage. No attempt'is made in Figure 5 to show any detailsoithecord circuit, operators telephone, etc., as these do not relate tothe inventive concept disclosed in. this figure, and their arrangementmay be varied within wide limits.

The busy test is preserved on lines in which plugs such as 44 are used,as the resistance 41R preserves the continuity of the sleeve circuit Sof the plug through the lamp 46 with relay 46R in any position.Resistance 41 merely protects the lamp 46 from the increased voltagewhen battery 45is used. Resistance 41R is sufiicient to totallyextinguish the lamp 46 while preserving the continuity of the sleevecircuit for busy test purposes.

In the case of magneto exchanges and where the telephones are of thelocal batterytype, the provision of special cord circuits like Figure 5with the usual bridged supervisory ring down drop 48 in series with acondenser 49 across the cord will enable any of the circuits Figures 1to 4 inclusive to be operated. For magneto ex changes thesupervisorylam'p' 46,-resistance 41 and the accompanying supervisoryrelay 46R are not required, the latter being replaced by a properimpedance coil. Also whenthe telephones are for magneto serviceusinghand generators ,for signalling. theexchange it is well "to providethe generator .50 vwith a pushbuttonilQFigure the generator beingconnectedbetween Li and the lower contact 52 =o'fthls 'pushbutton sothat when signalling central .thesub'scriber will not as commonly usedin so-called automatic exchanges.

It will be observed that in all cases the subscriber can signal theexchange operator while. a special cord circuit such as that showninFigure 5 is in use. In a commonbattery ofllce, if

the subscriber raises and lowers the hook switch H on the telephone, thesupervisory signal lamp 46 will flash. In a magneto omce, the subscriberoperates the magneto generator 50, Figure 4, while pressing the button5i, and thereby operates the signal 48 in the cord circuit. The key 42may be equipped with a pilot light 53 which is on when,the key is thrownand off when it is restored to normal. I

While telephone apparatus is shown in Figures 1 to 5 inclusive, it willbe understood that other 1 communication apparatus such as telegraph orfacsimile apparatus can be used, the inventive concept being broadly theuse of the line circuit for at least two purposes; to wit, as acommunication channel and simultaneously therewith supplying via thesame channel, the operating current for the phonograph instrument. Attimes the channel is also used to control the operation of thephonograph; i. e., to connect and slight modifications in the disconnectit from the line circuit. Changes in the instrumentalities such asrelays, condensers, etc., necessary when other than telephone apparatusis used are well understood and are therefore not described herein.

In some systems it may be desirable to operate the phonographs by a-mechanical motor such as the .usual spring motor often used withportable phonographs. I

Referringto Figure 6, a mechanical motor, for example a spring motor-isdiagrammatically shown at 54, As the construction of such motors is wellknown, it is not shown in detail. Such motors have a'control mechanismfor starting and stopping the motor, such as the lever 55 normally heldin the stop position by spring 58. The motor may have a winding key (notshown) whereby it maybe wound by hand in the sary in open position bythe spring 52. Armature 6| engages and moves the lever 55 to the on"position whichgpermits the motor 54 to operate and shaft 68 revolvedthereby operates any suitable mechanism such as the gear train 54 tocause cam 65 to release arm 86 to engage contact 81 thereby completing acircuit through battery 58 and winding 89 on relay 5], the armature 6|of which holds the control lever 55 in position while the motor 54'continues to operate the desired length of time determined by therevolutio of cam 65.

When cam 5 opens the locking circuit at 81, the armature 6| is releasedand the control lever 55 released thereby moves to the "oil" positionand the motor stops. While the motor is at rest, contact 61 is open.

While the motor 54 is in operation, it rotates shaft I8 of the recordtable I4 as shown in F18- ure 1 and the phonograph operates aspreviously described, being operatively connected to the line circuitLl, L2, as the hook switch H of the telephone is permitted to move toclosed circuit position by the upward movement of the cam arm 86, whichoperates in this respect same as the cam arm ll of Figure 1.

When the subscriber uses the hand generator 80, push button 59 may bepressed to open contact 58 and close contact II so that the relay 5'! isdisabled and will not operate to place the phonograph in service onoutgoing calls. If the contacts 58, 59 and 'II are in the hand generatorshunt, then the mere act of turning the generator crank will besuilicient and the telephone can be used without the phonograph.

On party lines the control means such as relay 51 may be a Gillselector, or any type of selector relay responsive to code or otherimpulses, such for example as the relay shown in the copendingapplication Serial Number 456,157, flied on August 26th, 1941, so thatthe phonograph will respond only when the particular telephone where itis located is called,

Figure 6 shows a magneto telephone and line. If the line is connected toa common battery exchange, the telephone circuits will be modifiedaccordingly, battery 58 may be omitted and the conductors 12, I3connected to LI and L2 respectively. Of course the hand generator 88 andpushbutton- 59 are omitted as unnecessary, and condenser C and ringer Sare connected in series across the line LI, L2, conductor I4 then beingconnected to LI Y The foregoing descriptlon ot Figure 6 presupposes thatthe phonograph motor 54 is hand wound. If the subscriber fails to windit periodicalLv. the phonograph will not operate, and it is desirable tohave the winding or the phonograph under the control of the centraloilice operator where it can be attended to as a matter of operatingroutinesay between 2:00 and 3:00 a. m., or at such other time as thetelephone line is not liable to be in use. This may be accomplished bythe additional equipment now to be described in connection with Figure 6wherein at I5 is shown an electric motor connected by suitable gearingindicated at I5 with the winding wheel II oi the spring motor 54 havingthe release pawl Il which releases the wheel 'I'I when the spring of themotor 54 is sufliciently wound. Such electric-spring combinations are incommon use on home phonographs. By applying current to motor I5 it willwin the spring in 54, and may be so designed as to require a very smallcurrent for its operation. It may be designed to operate for a period offortyfiv minutes to wind the spring in 54 sufilciently to permit thephonograph to deliver or record sufllcient messages so that it need notbe wound but once in 24 hours, and as this winding is done when thetelephone or phonograph is not in use, there is no danger of motor-noiseinterfering with the transmission over line LI, L2.

Themotor I5 is connected across lines Ll, L2,

' in series. with contacts I8 of a relay 8!! having a winding 8| inseries with a condenser 82, contacts 58, 59 and lines Ll, L2 as shown.To operate motor I5, the operator rings on line LI, L2 in the usualmanner, using some other frequency than is used to operate ringer S. Forexample, if 16 cycle current is used for the ringer S, the relay 88 maybe operated by 66 cycle current. This obviates starting thephonographwhen operating motor I5.

When relay 88 closes its contacts. a holding or looking circuit isestablished for direct current from Ll over conductor 82 to the cam arm'83, contact 84 locking winding 85 and contact 86 to L2. This holdsrelay 88 closed until cam 81 operates to open contact 84. Cam 8! isconnected to the gearing I6 inany suitable manner and forms a secondcontrol device, so that when it operates, the holding circuit remainsclosed long enough for motor I5, which is operating the while, to fullywind the spring of motor 54. The pawl I8 permits the motor 15 to overrunshould the spring be partially wound when the motor I5 starts. Themotors 54 and I5 together form a "motor means" for operating thephonograph.

When relay is released, it opens the circuit through motor I5 as well asthrough its own hold- Relay 51 may then be operated by 33 cycle currentand 80 by 66 cycle current. By this means the operator has independentcontrol of the teleindicate when the winding operation is com- Plated.This is shown in Figure 7 where 88 is a suitable source of current forthe motor'15, and W is a supervisory relay controlling the pilot lampwhich is illuminated as long as the plugdl is connected to a line and amotor 15 is in operation thereon. p

The subscriber can signal the central ofllce when the cord circuit,Figure 1, is in use, This may be accomplished by providing relay 88 withan armature 92 which will not close when armature 98 closes, but willonly close when the subscriber removes his receiver R from the hook H,thereby increasing the current flowing through relay 89. Lamp 04 willthen be illuminated and by moving the hook up and down, the subscribercan attract the attention of the operator..

Another method whereby the subscriber can signal the operator is tooperate the pushbutton 59, Figure 6, thereby opening the circuit throughthe motor 10 and flashing lamp 90 to attract the operators attention.Thus the motors 15 can be wound without making itimpossible for thesubscriber to get the operator the while.

Figure 8 illustrates an arrangement whereby when the springwound motor54 requires rewinding it will automatically connect the electric m0".tor 10 to the line, wind itself and restore the circuits tonormal. Thisis accomplished by mounting a contact devicesuch as the cam 01 to bedriven by the gear train 63 on motor 54 in such a manner that the camwill make one revolution with one winding of the spring of motor 54.When the motor spring is about exhausted; that of cam 01 operates thecontact 09 bridged across the contacts 05 of relay 80. This causes relay80 to close its contacts thereby starting motor 15 as described inconnection with Figure 6. Lobe 00 may pass by the contacts but as relay80 looks in, the motor 15 will operate until cam 81 driven by thewinding gear train 10 (shown in Figure 6 and indicated by dotted lines,Figure 8) operates to break the normally closed contact 84 therebyreleasing the relay 80 by opening .the circuit through locking winding85 thereof, thereby opening the motor circuit at 19. The phonographimpressed on the line by the interrupter I00 in series with devices suchas the centrifugally operated switches Ill and I02, and a resistanceimpedance or repeating coil winding I03. The operator therefore knowswhen listening on the line,

If it should'be supervisory lamp will light and the operator may takedown the plug.

' The tone-signal will not be heard on the lineshould the phonographoperate as the circuit is opened at I02 when the phonograph shaft E3 isrotating. The circuit is open at Nil when the motor 15 is not operating,so when the operator 7 rings on the line, operating relay 51 and thephonograph as previously described in connection with Figure 6, the tonecircuit is inoperative.

Figure 8 is in all respects not specifically described, same as Figure6. If used on magneto lines, some local source of current must be available if the automatic'self-winding feature :Iust

described is desired. This may be a connection to the locallightingcircuit or a suitable battery.

connected at I04, I05, the wires 82 and L2--I being cut as shown at x..In the event this is done, the tone circuit may be completed to LI, L2inductively by winding I00 on the same core as the tone signal windingI03 and therefore coupled thereto. ".he condenser I01 makes this circuitopaque to direct current.

The details of construction of the phonograph instrument per se are notdescribed, as it is obvious that the phonographcan be used .forrecording or reproducing or both; that is to say, if equipped with atalk-out record it will first deliver a message before recording one.Such a phonograph instrument'is described in detail in Patent Number2,261,420 dated November 4, 1941,

' and as the instant application is limited to the .is to say, when itshould be rewound, the lobe 0B circuits and instrumentalities necessaryto control the phonograph, the construction of the latter is notdescribed in detail. e I

Therefore the phonograph may be termed a "sound'device and is soreferred to in some of the appended claims, this term defining a phono:graph that will record or reproduce or both.

Also in the claims, the telephone instrument of any character may bereferred to as a sub set" Also, it will be obvious, as shown in Figure9, that without departing from the spirit of the invention hereindisclosed, the phonograph mechanism may be completely divorced from thetelephone sub-set or other transmitting device.

In Figure 9, by way of illustrating a transmitting device associateddirectly with thephonograph, the numeral I08 denotes ,a complete subsetof any suitable type such as shown at I0, Figure 1. -The phonographequipment is the same as shown in Figure 1, except that the arm I Ioperates a switch I09 instead of operating the switch hook H of thesub-set. This places a transmitting device such as the transmitter I I0across the line Ll, L2, instead of the transmitter T, Figure 1. .In allother respects the operation of the ap-" paratus, Figure 10, is the sameas that shown in the preceding figures.

Should the circuit LI, L2 be a magneto line, the transmitter H0 would beprovided with a local battery and connected to the line via an inthat ahonograph is being wound, and may duction coil in the usual mannen'asshown diagrammatically between the dotted lines III.

The device between the dotted lines II2 may therefore form a unitadapted to be connected to a line circuit and operated independently ofany other device such as the telephone I00 connected thereto, and inaccordance with the circuit arrangement shown in any of the precedingfigures.

What is claimed is: 1. A communication circuit, a telephone transmitterconnected thereto, a phonograph including an electric motor, meansoperable over said circuit for connecting said phonograph and motorthereto and a source of current connected to said circuit forcontinuously operating said moor while same is connected to saidcircuit.

2. A communication circuit, a telephone transmitter connected thereto, aphonograph including an electric motor, means operable over said circuitfor connecting said phonograph and motor thereto and a source of currentconnected to said circuit for continuously operating said motor and saidtransmitter while same are respectively connected to said circuit.

3. A communication circuit, a telephone transmitter connected thereto, aphonograph including an electric motor, means operable over said circuitfor connecting said phonograph and motor thereto, a source of currentconnected to said circuit for continuously operating said motor whilesame is connected to said circuit, and means controlled by apredetermined number of revolutions of said motor for disconnecting samefrom said circuit.

4. A communication circuit, a telephone transmitter connected thereto, aphonograph including an electric motor and having a record andtranslating means therefor, means operable over said circuit forconnecting said phonograph and said motor thereto, a source of currentconnected to said circuit for continuously operating said motor whilesame is connected to said circuit, and means 6. A communication circuit,a telephone trans-' mitter connected thereto, a phonograph includ ing amotor, means responsive to alternating current flowing in said circuitincluding a relay having a winding connected thereto, a second windingon said relay, a normally open contact adapted to be actuated by theoperation of said relay and in series with said second winding, 8.phonograph having a motor winding in series with said second winding onsaid relay and said circuit, switching means operated by said motor foropening the circuit through said second winding of said relay andre-establishing said circuit .to place said motor winding directlyacross said cir- .cuit, said means being operable by a predeter-' minednumber of revolutions of said motor for opening said last re-establishedcircuit.

'7. A communication circuit, a telephone trans- -mitter connectedthereto a phonograph including an electric motor, means operable oversaid circuit for connecting said phonograph and motor thereto and asource of current connected to said circuit for continuously operatingsaid motor while same is connected to said circuit, said means includinga time delay device whereby the length or time said phonograph and motorare in operation is predetermined.

- 8. A communication circuit, a telephone transmitter connected thereto,a phonograph including a motor, means operable over said circuit forconnecting said phonograph and motor thereto, a source of currentconnected to said circuit for operating said motor, and filter meansconnected said communication circuit and under control or said cordcircuit for connecting said motor to said communication circuit andmeans for operating said motor including a source or current supplied tosaid communication circuit via said cord circuit.

10. The combnation as claimed in claim 9 wherein said first meansincludes a device responsive to alternating current supplied via saidcord circuit.

11..I'he combination as claimed in claim 9 wherein the application orsaid source or current also supplies a communication device connected tosaid communication circuit.

12. In a communication system having a common battery for supplyingcommunication instruments with operating current, connecting cordcircuits, lines having communication devices. connected thereto andadapted to be connected by said cord circuits, phonographs havingmotors, means associated with said phono graphs whereby current appliedthereto via said cord circuits and lines will connect said motors tosaid lines, and switching means in said cord 4 circuits for connecting asecond common battery to said lines to supply the motors connectedthereto with operating current.

13. In a communication system having a central oflice switchboardincluding a connecting cord circuit, aline having a communicationinstrument connected thereto and adapted to be connected to said cordcircuit,- a phonograph having a motor, means associated with saidphonog'raph whereby current applied thereto via said cord circuitandline will connect said motor to said line, and means for supplyingcurrent to said cord circuit for operating said motor.

14. The combination as claimed in claim 13 wherein said last meansincludes the winding of a supervisory'device connected to the cordcircuit.

15. The combination as claimed in claim 13 wherein said last meansincludes a switching device having a supervisory pilot signal operatedthereby to indicate when said cord circuit is connected to supplycurrent to said motors.

16. A communication circuit, a sound device including a mechanicalmotor, control means connected to and operable by current flowing in.said circuit for starting and stopping said motor, and means operatedby said motor to cause said control means to stop said motor after apredetermined number or revolutions thereof.

17. A communication circuit, a sound device including a spring motor,control means including an electrical device having a winding connectedto said circuit and adapted to be energized by current flowing therein,a second winding-on said electrical device serially included in acircuit including a source or current and a normally'closed contactadapted to be opened by the operation of said motor, and meanscontrolled by said electrical device for starting and stopping saidmotor.

18. A communication circuit, a sound'device including a spring motor,control means including an electrical device having a winding connectedto said circuit and adapted to be ener-. gized by current flowingtherein, a second winding on said electrical device serially included ina circuit including a source of current and 9. normally closed contactadapted tobe opened by the operation of said motor, means controlled bysaid gized by current flowing therein, a second winding on saidelectrical device serially included in a circuit including a source ofcurrent and a normally closed contact adapted to be opened by theoperation of said motor, means controlled by said electrical device forstarting and stopping said motor, a transmitting apparatus adapted to beconnected and disconnected from said communications circuit by theoperation of said motor, a signal device connected to saidcommunications circuit, and means connectable to said circuit forseparately operating said control means and said signal device.

- 20. A communication circuit, transmitting ap paratus connected theretoincluding switching mechanism whereby the transmitting apparatus may beconnected to said circuit, a sound device including a mechanical motor,means operated by said motor for operating said switching mechanism, acontrol device connected to said circuit and arranged to cause saidmotor to operate said sound device, means controlled by the operation ofsaid motor for actuating said control device to stop said motor in timedrelation to the operation of said first means, means operable to send asignalling current out over said circuit, and

switching. means associated with said, last means for preventing currenttherefrom from operating said control device. I

21. A circuit, a phonograph including a spring p motor, means operableover said circuit for'connecting said phonograph thereto, an electricmotor connected to said spring motor to wind the spring thereof, andcontrol means for operating said electric motor by current suppliedthereto over said'circuit.

*22. The combination as claimed in claim 21 v wherein said control meansincludes a relay connected to said circuit and operable by currentflowing therein.

23. The combination as claimed in claim 21 wherein said control meansincludes a relay operable'by current flowing in said circuit and havinga locking winding operable by another current flowing in said circuit,contacts in circuit with said winding, and a second controldeviceconnected to said locking winding and operated by said electric motor.

24, A circuit, a sound device including a spring motor, meansforoperatively connecting saidv device to said circuit, an electric'mot'orconnected to said spring motor to wind the spring thereof, control meansfor connecting said electric motor to said circuit to be operated bycurrent flowing therein, said means including a relay operable bycurrent flowing in-said circuit, a locking circuit including a windingand contacts on said relay, and a second control means connected to saidlooking circuit for disconnecting saidelectr'ic motor. and operatedthereby.

25. A circuit, a sound device including a spring motor, means foroperatively connecting said device to said circuit, an electric motorconnected to said spring motor to wind the spring thereof,

gearing between said motors including an overrun device, control meansfor connecting said electric motor to said circuit to be operated bycurrent flowing therein, and a second control means for disconnectingsaid electric motor operated thereby. w

26. A circuit, a sound device including a spring motor, means foroperatively connecting said dovice to said circuit, an electric motorconnected to said spring motor to wind the spring thereof, gearingbetween said motors including an overrun device, control means forconnecting said electric motor to said circuit to be operated by currentflowing therein, and a second control means operated in timed relationto said electric motor for dis-connecting same from said circuit.

27. A circuit, a sound device including a spring I motor, means foroperatively connecting said device to said circuit, an electric motorconnected to said spring motor to wind the spring thereof, gearingbetween said motors including an overrun device, control .means forconnecting said electric motor to said circuit to be operated by currentflowing therein, said means including a relay having a winding connectedto said circult, a holding circuit for said relay including a windingthereon and a contact controlled by said relay, and meanscontrolled bysaid electric mo-.

tor for disabling said holding circuit to release said relay and therebydisconnect said electric motor from said first circuit.

- 28. In combination, line circuits each havingv a transmittingapparatus and an associated phonograph, said line circuits terminatingin a central oflice, motor means at said phonographs for operating same;means located at said phonographs and controllable from said centraloflice for operatively connecting said phonographs to said linecircuits, means including switching instrumentalities applicable to anyline circuit in said central ofllce for operating said first means, andmeans partly at said phonographs and partly at said central office forsupplying current to the motor means at said phonographs from a sourceof current located at the central ofllce.

29. In combination, line circuits each having a transmitting apparatusand an associated phonograph, said line circuits terminating in acentral office, motor means for operating each phonograph, means at eachof said phonographs and controllable over the line circuit associatedtherewith for operatively connecting said phonograph to said linecircuit, means at said central oflice applicable to anyline circuittherein for operating said flrst means, a. source of current at saidcentral ofllce, and means at said central oflice applicable to any linecircuit therein for supplying said current thereto and to the motormeans connected in circuit therewith.

30. In combination, line circuits each having a' transmitting apparatusand an associated phonograph, saidline circuits terminating in a centraloilice, motor means for operating each phonograph, means at each'of saidphonographs and controllable over the line circuit associated therewithfor operativelyconnecting said phonograph to said linecircuit, means atsaid central oiflce applicableto any line circuit therein for operat--ing said first means, a source of current at said cable to any linecircuit therein for supplying a said current thereto and to the motormeans connected in circuit therewith, and-means operated by apredetermined number of revolutions of a part of said motor means fordisconnecting said phonograph from its associated line circuit.

with for operatively connecting said phonograph to said line circuit,means at said central oflice applicable to' any line circuit therein foroperating said first means, a source of current at said central oflice,means at said central omce applicable to any line circuit therein forsupplying said current thereto and to the motor means connected incircuit therewith, and'means operated by a predetermined numberofrevolutions of a part of said motor means for disconnecting said motormeans from its associated line circuit.

32. In combination, line circuits each having a transmitting apparatusand an associated phonograph, said line circuits terminating in acentral omce, motor means for operating each phonograph, meansat each ofsaid phonographs and controllable over the line circuit associatedtherewith for operatively connecting said phonograph to said linecircuit, means at said central ofllce applicable to any line circuittherein for operating said first means, a source of current at saidcentral oiiice, means at said central oflice applicable to any linecircuit therein for supplying said current thereto and to the motormeans connected in circuit therewith, means operated by a predeterminednumber of revolutions of a part of said motor means for disconnectingsaid phonograph from its associated line circuit, and means operated bya predetermined number of revolutions of a part of said motor means fordisconnecting said motor means from its associated line circuit.

33. In combination, a line circuit, a transmitting device, a phonographhaving a spring motor, means connected to said line circuit and operableby current flowing therein for releasing said spring motor to drive saidphonograph, means operated by said spring motor for connecting saidtransmitting device to said line circuit, an electric motor connected tosaid spring motor to wind the spring thereof, and means controlled bysaid spring motor for connecting said electric motor to said linecircuit to be operated by current flowing therein.

34. In combination, a line circuit, a transmitting device, a. phonographhaving a spring motor, means connected to said line circuit and operableby current flowing therein for releasing said spring motor to drive saidphonograph, means operated by said spring motor for connecting saidtransmitting device to said line circuits, an electric motor connectedto said spring motor to wind the spring thereof, means controlled bysaid spring motor for connecting said electric motor to said linecircuit to be operated by current flowing therein, and means controlledby said electric motor for disconnecting same from said line circuit.

35. In combination, a line circuit, a transmitting device, a phonographhaving a spring motor, means connected to said line circuit and operableby current flowing therein for releasing said 2,896,961 centraloflfice,'means at said central oflice applispring motor to drive saidphonograph, means operated by said spring motor for connecting saidtransmitting device to said line circuit, an electric motor connected tosaid spring motor to wind the spring thereof, and meansconnected to saidline circuit and operable by current flowing thereover for connectingsaid electric motor to said line circuit whereby said motor is operatedby current flowing over said circuit.

36. In combination, a line circuit, a transmitting device, a phonographhaving a spring motor, means connected to said line circuit and operableby current flowing therein for releasing said spring motor to drive saidphonograph, means operated by said spring motor for connecting saidtransmitting device to said line circuit, an electric motor connected tosaid spring motor to wind the spring thereof, means connected to saidline circuit and operable by current flowing thereover for I connectingsaid electric motor to said line circuit whereby said motor is operatedby current flowing over said circuit, and means controlled by theoperation of said electric motor for disconnecting same from said linecircuit.

37. The combination as claimed in claim 36 wherein the means controlledby the operation of the electric motor for disconnecting same from theline circuit includes a relay having a locking winding in circuit withcontacts operated by the movement of the electric motor, said relayhaving a contact controlling the line circuit through the motor. l

38. The combination as claimed in claim 36 wherein the means controlledby the operation'oi the electric motor for disconnecting same from theline circuit includes a relay having a locking winding in circuit withcontacts operated by the movement of the electric motor, said relayhaving a contact controlling the line circuit through the motor, andsaid rela having a winding connected to said line circuit whereby said'relay may be operated by current applied thereto via said line circuit.

39. In combination, a line circuit, a transmitting device, a phonographhaving a spring motor, means connected to said line circuit and operableby current flowing therein for starting said motor and connecting saidtransmitting'device to'said line circuit, an electric motor connected tosaid spring motor to wind the spring thereof, and means operable whensaid spring motor is at rest and said electric motor i in operationforming a tone circuit for impressing a signal-tone on said linecircuit.

40. The combination as claimed in claim 39 wherein said last meansincludes switches operated by said motors.

41. In combination, a line circuit, a transmit ting device, a phonographhavin a spring motor, means connected to said line circuit and operableby current flowing therein for starting said motor and connecting saidtransmitting device to said line circuit, an electric motor connected tosaid spring motor to wind the spring thereof, and means operable whensaid spring motor is at rest and said electric motor is in operationforming a tone circuit for impressing a signal-tone on said linecircuit, said last means including centrifugal switches operated by saidmotors.

42. The combination as claimed in claim 39 wherein said last meansinclude switches operated by said motors and serially included in saidtone circuit with an interrupter driven by said electric motor, saidtone circuit being coupled to aseaoei said line circuit to impress asignal-tone thereon while said electric motoris in operation.

43. The combination as claimed in claim 39 including means for renderinglaid tone circuit inoperative when said electric motor has wound thespring of said spring motor to a predetermined tension. 3

44. In combination, a line circuit, a transmitting device, a phonographhavin a spring motor. means connected to said line circuit and op rableby current flowing therein for starting said motor and connecting saidtransmitting device to said line circuit, an electric motor connected tosaid spring motor to wind the sprin thereof, means connected to saidline circuit for starting said,

electric motor, and means for impressing a signal tone on said linecircuit while said electric motor is operating. 1

45. In combination, a line circuit, a transmitting. device, a phonographhaving a spring motor, means connected to said line circuit and operableby currentflowins therein for starting said motor and connecting saidtransmitting device to. said line circuit, an electric motor connectedto said spring motor to wind the spring thereof, means connected to saidline circuit for starting said electric motor, means for impressing asignal tone on said line circuit while said electric motor is operating,and means controlled by said spring motor for disconnecting said signaltone from said line circuit while said spring motor is in operation.

46. In combination, a line circuit, a graph having a spring motor, anelectric motor connected to said spring motor to wind the springthereof, a source or current for operating s id electric motor, meanscontrolled by said sprin motor for connecting said-electric motor tosaid source or current, and means controlled by said electric motor fordisconnecting same from said source or current.

47. In combination, a line circuit, a. phonograph having a, springmotor, an electric motor connected to said spring motor to wind thespring thereof, a source of current for operating said electric motor,means controlled by said spring phonomotor for connecting said electricmotor to said source 0! current, means connected to and operable bycurrent in said line circuit for connecting said electric motor to saidsource of current, and means controlled by said electric motor iordisconnecting sam from said source of current.

48. In combination, a line circuit, a. phonograph having a sprin motor.an electric motor connected to said spring motor to wind the springthereof, a source of current tor operating said electric motor, meanscontrolled by said spring motor for connecting said electric motor tosaid source of current, means connected to and operable by current insaid line circuit for connecting said electric motor to said source oi!current including a relay having a winding connected to-said, linecircuit and a lockin winding in a locking circuit connected to saidsource of current, and means controlled by said electric motor ioropening said relay and disconnecting said electric motor from saidcurrent source.

HARRY R. VAN DEVENTER.

